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pickupchik [31]
3 years ago
5

The side lengths of four triangles are listed below. Determine whether each triangle is a right triangle Choose Yes or No for ea

ch set of side lengths.
a. 4,5,6 Yes No
b. 5, 12, 13 Yes No
C. 8, 15, 17 Yes No
d. 10, 15, 20 Yes No​
Mathematics
2 answers:
12345 [234]3 years ago
8 0
In order to determine if it’s a right triangle, use the following formula:

c2= a2 + b2

A. 16 + 25 = 36 NO.
B. 25 + 144 = 169 YES.
C. 64 + 225 = 289 YES.
D. 100 + 225 = 400 NO.

You basically multiply each number by itself and then;
Add a2 + b2.
If the sum matches c2,
Then it is a right triangle!
Ira Lisetskai [31]3 years ago
6 0

Answer:

yes, yes, no, no

Step-by-step explanation:

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Answer: There are 4 students in the group.

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Let the number of students in the group be n

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So, our equation (1) will be

\frac{\sum x+9}{n}=81\\\\\sum x+9=81n

Similarly,

If one of them scored 3 points less, their average score would be 78 points.

So, our equation (2) will be

\frac{\sum x-3}{n}=78\\\\\sum x-3=78n

So, from equation (1) and (2) we get:

81n-9=\sum x=78n+3\\\\81n-9=78n+3\\\\81n-78n=3+9\\\\3n=12\\\\n=\frac{12}{3}\\\\n=4

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3 years ago
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Answer:

0.9

Step-by-step explanation:

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3 years ago
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pychu [463]
The area of a circle is pi times the radius squared. the radius of this circle is 16.8cm, which is 282cm when squared. multiplied by pi it becomes 887cm.
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Ierofanga [76]

Answer:

11.2 mm

Explanation:

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Insert Values:

x² + 3.8² = 11.8²

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